Malicious PDF — malware analysis report

Static analysis result for SHA-256 01461eeca20562fc…

MALICIOUS

PDF

93.6 KB Created: 2021-07-31 01:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0bd828bcb0da961a493f5ac026e88e4 SHA-1: 2d3d8112fbed3e94d425241022d0cffc47e5e00b SHA-256: 01461eeca20562fc61ddd7d3295a27af02b20d4d8bf4365108db85a945967153
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be redirecting users to potentially malicious content, such as phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://harkakotony.hu/UserFiles/file/fobozovozifivizuginaji.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/pr0ohs1eh5llhjrg1h7a1ttq00/40062182354.pdf
    • https://aneri12.eu/res/file/80544999402.pdf
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/ium7eellne7km2kg7n7bt6p7md/baxuloxukadoxu.pdf
    • http://arniestribu.com/campannas/file/33522420995.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160add3bf5cdc7---66307915829.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/29e85a8de8f12cd3bbac614a26606349/tazuruwonuxededisejafat.pdf
    • http://chanakol.com/ckfinder/userfiles/files/73144339466.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ad650ede76fpobr0re9ufelmfq/19075421527.pdf
    • http://chnli.tw/CKEdit/upload/files/22072693075.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/43eb9d6c3da868d874fe73494094ca97/74242701793.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/90558626672.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f125b3592---44440242683.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/v45dmtfdvomiai00m7g318gkci/88649620060.pdf
    • http://obraz-tlt.ru/userfiles/file/dozajisejisit.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607da98c84401---jofemikuwotokil.pdf
    • https://isleo.com/i_photos/file/saxide.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bae40c3a13---vomivemam.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070686cb5b03---74978906689.pdf
    • https://ludifrance.fr/userfiles/file/55559032457.pdf
    • http://shinies.ru/img/lib/file/xedoxujugawipoxixuven.pdf
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23287099450.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b538dacaa4---kosamifokipubuxu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=queen+bohemian+rhapsody+piano+part
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed32.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 16164 bytes
font_01_sfnt_off000102a9.bin
715b1986d00c2c5e64b0215ee8aa8ee2ebcff5bafd833acd4eb88dc9c6590155
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 11024 bytes
font_02_sfnt_off00011bfd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFD 16792 bytes
font_03_sfnt_off0001340f.bin
4a1f0094368938e58fc263f4d0ea1949ee9458a97124efafe307e0b3bef1d837
pdf-font-stream PDF embedded font (sfnt) at offset 0x1340F 19064 bytes